高强度二冷对高碳钢小方坯凝固组织和中心碳偏析的影响

特殊钢 ›› 2006, Vol. 27 ›› Issue (4): 42-44.

高强度二冷对高碳钢小方坯凝固组织和中心碳偏析的影响

冯军, 陈伟庆

北京科技大学冶金生态与工程学院，北京100083

收稿日期:2006-01-26 出版日期:2006-08-01 发布日期:2023-03-18
作者简介:冯军(1969-),男，博士生,从事连铸工艺研究。

Effect of High Secondary Cooling Intensity on Solidification Structure and Center Carbon Segregation of High Carbon Steel Billet

Feng Jun, Chen Weiqing

School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083

Received:2006-01-26 Published:2006-08-01 Online:2023-03-18

摘要/Abstract

摘要： 试验了250A/5Hz电磁搅拌连铸150 mm×150 mm方坯时二冷比水量对0．64％-0．82％C钢铸坯冷却速度、凝固组织和中心碳偏析的影响。结果表明,当二冷比水量由0．83 L/kg增加至1．55 L/kg时,距铸坯边缘46 mm处的一次枝晶臂间距由380μm降至300μm,平均中心碳偏析指数由1．15降至1．10,同时等轴晶比例由45％降至40％,二次强冷工艺适合于小方坯连铸。

Abstract: The effect of water ratio in secondary cooling zone on billet cooling speed, solidification structure and center carbon segregation index of 0.64% ~ 0.82%C steel 150 mm x 150 mm billet casting with 250A/5Hz electromagnetic stirring has been tested. The results showed that with water ratio in secondary cooling zone increased to 1.55 L/kg from 0.83 L/kg, the primary dendritic aim spacing at the location with distance from billet edge 46 mm decreased to 300 from 380 the average center carbon segregation index decreased to 1.10 from 1.15 and at the sometime the ratio of equiaxial crystal decreased to 40% from 45% , The high secondary cooling intensity is only fit for billets casting.

冯军, 陈伟庆. 高强度二冷对高碳钢小方坯凝固组织和中心碳偏析的影响[J]. 特殊钢, 2006, 27(4): 42-44.

Feng Jun, Chen Weiqing. Effect of High Secondary Cooling Intensity on Solidification Structure and Center Carbon Segregation of High Carbon Steel Billet[J]. Special Steel, 2006, 27(4): 42-44.